Active Directory Certificate Services (AD CS). AD CS role services install on a number
of operating systems, including Windows Server 2008, Windows Server 2003, and
Windows 2000 Server. Naturally the fullest implementation of AD CS is only possible
on Windows Server 2008. You can deploy AD CS as a single standalone certification
authority (CA), or you can deploy multiple servers and configure them as root, policy, and
certificate issuing authorities. You also have a variety of Online Responder configuration
possibilities.
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